公开(公告)号：WO2010151890A1

公开(公告)日：2010-12-29

申请号：PCT/US2010/040247

申请日：2010-06-28

Applicant: QUALCOMM Incorporated ,  TRIKHA, Pushp K. ,  PAN, Tzu-wang ,  YANG, Eugene ,  ZENG, Yi ,  LIN, I-Hsiang ,  VISHWANATH, Tg

Inventor： TRIKHA, Pushp K. ,  PAN, Tzu-wang ,  YANG, Eugene ,  ZENG, Yi ,  LIN, I-Hsiang ,  VISHWANATH, Tg

IPC: H04H20/57 ,  H04B1/40 ,  H04H40/45

CPC classification number: H04H20/57 ,  H04H40/45

Abstract: A frequency modulation (FM) transmitter implemented with a delta-sigma modulator and a phase-locked loop (PLL) is described. The delta-sigma modulator receives a modulating signal (e.g., an FM stereo multiplex (MPX) signal) and provides a modulator output signal. The PLL performs frequency modulation based on the modulator output signal and provides an FM signal. The FM transmitter may further include a gain/phase compensation unit and a scaling unit. The compensation unit may compensate the modulating signal for the closed-loop response of the PLL. The scaling unit may scale the amplitude of the modulating signal based on a gain to obtain a target frequency deviation for the FM signal. The PLL may operate in a transmit mode or a receive mode, may perform frequency modulation in the transmit mode, and may provide a local oscillator (LO) signal at a fixed frequency in the receive mode.

Abstract translation: 描述了用Δ-Σ调制器和锁相环（PLL）实现的频率调制（FM）发射机。 Δ-Σ调制器接收调制信号（例如，FM立体声多路复用（MPX）信号），并提供调制器输出信号。 PLL根据调制器输出信号进行调频，并提供FM信号。 FM发射机还可以包括增益/相位补偿单元和缩放单元。 补偿单元可以补偿PLL的闭环响应的调制信号。 缩放单元可以基于增益来调整调制信号的幅度，以获得FM信号的目标频率偏差。 PLL可以以发送模式或接收模式工作，可以在发送模式下执行频率调制，并且可以在接收模式下以固定频率提供本地振荡器（LO）信号。

公开(公告)号：WO2014150035A2

公开(公告)日：2014-09-25

申请号：PCT/US2014/021939

申请日：2014-03-07

Applicant: QUALCOMM INCORPORATED

Inventor： YANG, Eugene ,  KANG, Eunmo ,  SABOURI, Faramarz

IPC: H03D3/00

CPC classification number: H04B15/00 ,  H03D3/009 ,  H03D7/165 ,  H04B5/00 ,  H04L7/033 ,  H04L25/4902 ,  H04L27/206 ,  H04L27/2092 ,  H04L2027/0018 ,  H04L2027/0057 ,  H04L2027/0067

Abstract: A method for communication between near field communication (NFC) devices includes generating a transmission signal, an in-phase local oscillator signal, and a quadrature local oscillator signal from edges of an input clock signal. The method further includes mixing a load modulated signal with the in-phase local oscillator signal to generate an in-phase baseband signal. The method further includes mixing the load modulated signal with the quadrature local oscillator signal to generate a quadrature baseband signal. The method further includes adjusting a phase delay of at least one of the in-phase local oscillator signal or the quadrature local oscillator signal in response to a first signal strength of the in-phase baseband signal and a second signal strength of the quadrature baseband signal.

Abstract translation: 用于近场通信（NFC）设备之间的通信的方法包括从输入时钟信号的边缘生成传输信号，同相本地振荡器信号和正交本地振荡器信号。 该方法还包括将负载调制信号与同相本地振荡器信号混合以生成同相基带信号。 该方法还包括将负载调制信号与正交本地振荡器信号混合以生成正交基带信号。 该方法还包括响应于同相基带信号的第一信号强度和正交基带信号的第二信号强度来调整同相本地振荡器信号或正交本地振荡器信号中的至少一个的相位延迟

公开(公告)号：WO2010045360A2

公开(公告)日：2010-04-22

申请号：PCT/US2009/060678

申请日：2009-10-14

Applicant: QUALCOMM Incorporated ,  LINSKY, Joel Benjamin ,  FONG, Gene ,  SABOURI, Faramarz ,  YANG, Eugene ,  ZHAO, Desong ,  LANE, Mark ,  CARGILL, Thomas P.

Inventor： LINSKY, Joel Benjamin ,  FONG, Gene ,  SABOURI, Faramarz ,  YANG, Eugene ,  ZHAO, Desong ,  LANE, Mark ,  CARGILL, Thomas P.

IPC: H04B1/16 ,  H04W52/02

CPC classification number: H04W52/029 ,  H03L7/183 ,  H03L7/193 ,  H03L7/23 ,  H03L2207/06 ,  H04W52/0245 ,  H04W68/00 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/164

Abstract: An electronic device for communication comprises a processor. The processor comprises a power scan module configured to receive an energy detection signal identifying detection of energy of a page signal or an inquiry signal. The power scan module is further configured to provide, upon receiving the energy detection signal, an instruction to perform a page scan or an inquiry scan.

Abstract translation: 用于通信的电子设备包括处理器。 处理器包括功率扫描模块，其被配置为接收识别寻呼信号或查询信号的能量的能量检测信号。 功率扫描模块还被配置为在接收到能量检测信号时提供执行寻呼扫描或查询扫描的指令。